植物营养与肥料学报2010,16(1)：242-246 Plant Nutrition and Fertilizer Science
ALA对冬小麦叶片气体交换和水分利用
效率的影响
姚素梅，刘明久，茹振钢，杨文平，冯素伟
（河南科技学院生命科技学院，河南新乡453003）
摘要：以冬小麦"百农矮抗58"为材料，研究了在始糖期喷施不同浓度（10、30.50mg/L)的5-氨基乙酰丙酸(5 aminolevulinicacid，ALA)对冬小麦叶片气体交换和水分利用效率的影响。结果表明，10~50mg/LALA处理的叶片气孔导度高于不喷施的对照，但在开花期和乳熟期对气孔导度的促进作用大于熟期；叶片净光合速率也明显高于对照。在开花期和乳熟期，ALA提高叶片的净光合速率主要是由于减少了光合的气孔限制前在腊熟期则主要是由于减少了光合的非气孔限制。在开花期和乳熟期，10~50mg/LALA处理的叶片水分利用效率与对照没有显著性差异，但在腊熟期，叶片水分利用效事较对照有品著性提高。与对照相比，10~50m/LALA处理冬小麦的穗粒数、千粒重和产量显著增加，其中以30mg/LALA处理增产效果最大。
关键词：5-氨基乙酰丙酸；冬小麦；气孔导度；光合速率；叶片水分利用效率；产量
中图分类号：Q945；S513.06
文献标识码：A
文章编号：1008505X(2010)01024205
Effectsof5-aminolevulinicacidonleafgasexchangeand
wateruseefficiencyinwinterwheat
YAO Su-mei, LIU Ming-jiu, RU Zhen-gang, YANG Wen-ping, FENC Su-wei
(School of Lijfe Science and Technology, Henan Institute of Secience and Technology, Xinxiang, Hlenan 453003, China)
Abstract: Using "Bainong AK58" as experiment material, a field experiment was conducted to examine the effects of dif-ferent concentrations of 5aminolevulinic acid (ALA) (10 mg/L, 30 mg/L, 50 mg/L) applied at initial heading stage on leaf gas exchange and water use efficiency of winter wheat. The results were as follows: The stomatal conductance of winter wheat flag leaves treated with 1050 mg/L ALA were significantly higher than that of the control (O mg/L ALA); however the promotive effects of 10 50 mg/L ALA on stomatal conductance at flowering and milky stage was stronger than at dough stage. Applying 10 50 mg/L ALA increased the net photosynthesisrate of winter wheat flag leaves. At flowering and milky stage the increased net photosynthesis rate in 1050 mg/L ALA treatment was mainly due to the de crease of stomatal limitation, while at dough stage it was mainly contributed to the decrease of nonstomatal limitation caused by decreased photosynthetic capacity of mesophyll cells, Compared with the control, 10 50 mg/L ALA had no significant effect on the leaf water use efficiency at flowering and milky stages, while increased the leaf waler use efficien-cy significantly at dough stage. Applying ALA ranged form 10 to 50 mg/L increased grain numbers per spike, 1000 grains weight and grain yield of winter wheat, The highest grain yield was obtained when ALA was applied at level of 30 mg/L.
Key words: 5-aminolevulinic acid; winter wheat; stomatal conductance; net photosynthesis rate;
leaf water use efficiency; grain yield
收稿日期：2008-11-24
接受日期：2009-0211
基金项目：河南省教育厅自热科学研究计划项目(2007210007)；河南省重大科技专项(081100110200)资助。
作者篇介：姚素梅（1974一），女，河南拓城人，博士，副教投，主要从事农业水资源高效利用和作物高产载培理论与技术研究。
Tel; 03733040337, E-mail: yaosm@iganr.ae.en
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